Synonyms of sudden

sudden

adjective

ˈsə-dᵊn 

as in unexpected

not expected

the sudden snowstorm resulted in thousands of evening commuters abandoning their cars on impassable highways

Synonyms & Similar Words

• unexpected
• abrupt
• unforeseen
• unanticipated
• unlooked-for
• unlikely
• surprising
• startling
• improbable
• unplanned
• unintended

Antonyms & Near Antonyms

• anticipated
• foreseen
• expected
• predicted
• prophesied
• unsurprising

Synonym Chooser

How does the adjective sudden contrast with its synonyms?

Some common synonyms of sudden are abrupt, headlong, impetuous, and precipitate. While all these words mean "showing undue haste or unexpectedness," sudden stresses unexpectedness and sharpness or violence of action.

flew into a sudden rage

When might abrupt be a better fit than sudden?

Although the words abrupt and sudden have much in common, abrupt stresses curtness and a lack of warning or ceremony.

an abrupt refusal

When is it sensible to use headlong instead of sudden?

While in some cases nearly identical to sudden, headlong stresses rashness and lack of forethought.

a headlong flight from arrest

When is impetuous a more appropriate choice than sudden?

The meanings of impetuous and sudden largely overlap; however, impetuous stresses extreme impatience or impulsiveness.

an impetuous lover proposing marriage

Where would precipitate be a reasonable alternative to sudden?

While the synonyms precipitate and sudden are close in meaning, precipitate stresses lack of due deliberation and implies prematureness of action.

the army's precipitate withdrawal

Example Sentences

Recent Examples of sudden

The exercises are meant to test how rapidly military units can deploy, especially in the face of a possible sudden escalation of Chinese grey-zone warfare, the island’s Defense Ministry said. — ABC News, 24 June 2026

The need to complete that project has grown in urgency as NASA has faced increased competition with its space race rival, China, imbuing SpaceX’s sudden change in priorities with both financial and political stakes. — Jackie Wattles, CNN Money, 24 June 2026

But Krem has other ideas, unleashing sudden violence as the Knolls’ 13-year-old daughter Ruthye (Eve Ridley) witnesses the savage murder of her parents and brother. — David Rooney, HollywoodReporter, 24 June 2026

Combines smooth attack with sudden change of speed and direction, dexterity, and finishing craft in the lane. — Tom Ignudo, CBS News, 24 June 2026

Phrases Containing sudden

• all of a sudden

Video

'All over sudden' vs. 'All of a sudden'

Figuring it out at once